Those white ones that reenmachine posted are the same exact ones, just white. There is also the limited milky blue ones, which are the same as well. Kinda confusing imo.
I get my stuff from speedtech, and HK. HK stuff can get here in about a week if they ship it out fast. What sucks the most is when you have to order from multiple vendors since one store doesn't have everything you need.
for 17.5, I run about 4.5fdr. Out track is technical so need that bottom end. Go for under 4.0 if you have a long straight. Watch the temp though, I try to keep everything under 170F. pretty much what reenmachine says.
I copied a setting sheet from the TA05/TB03 guide book from Tamiya and works pretty good for me. Satoshi's recommended starting point for the IFS-R. I'll try to post it later on.